A unique shoot em up that plays similar to Galaga or Galaxian, but you are never backed into an imaginary wall due to the screen edges. Some gamers have jokingly called it "Galaga meets Tempest". You pilot your ship around the outside edge of the screen and shoot at your enemies toward the middle. This makes more sense since it gives more of a pseudo 3-D view. Defeat wave after wave of enemies to make your way toward Earth.